The New York State income tax is considerably less trouble to compute than the federal income tax. In part this is because you can simply carry over a lot of the entries on the federal return. But it is also because the computation is just simpler. The process does have some irritating features. In recent years New York has required you to copy your W2 information onto their own form instead of attaching the W2. And New York has have stopped mailing the forms (they are still available in public libraries) in an attempt to get you to file electronically.